This is just academic curiosity right now but in the future I might be in the market for a new production or even custom frame. I currently weigh 375 lbs and worst case scenario is that I stay at this weight. Best case scenario might have me in the mid-200's so I'll always be very heavy as far as bikes go.
I've been wondering about the differences between basic tubesets, like the cromoly 4130 used in Surly frames, and higher end tubesets used in more expensive frames. It's my understanding that a high-end steel like OX Platinum is stronger so less can be used, resulting in a lighter frame at a given durability level while a basic steel will result in a heavier frame at the same durability level. It's also my understanding that a lot of what differientiates a really high quality frame is "flex" from thinner tubing enhancing the ride in various ways.
My question is this: Given a tubeset that is strong enough for a rider my size, would the thickness of that tubeset keep that "flex" from occurring, thus negating the benefit of a high quality tubing? For a guy my size, is there really any benefit to a high level of tubing given that it's going to be quite thick anyway? Would a higher level of thick tubing flex less? Would that be a benefit to a guy my size?